Spin-independent transparency of pure spin current at normal/ferromagnetic metal interface

作     者：Runrun Hao Hai Zhong Yun Kang Yufei Tian Shishen Yan Guolei Liu Guangbing Han Shuyun Yu Liangmo Mei Shishou Kang 郝润润;钟海;康韵;田雨霏;颜世申;刘国磊;韩广兵;于淑云;梅良模;康仕寿

作者机构：School of Physics and State Key Laboratory of Crystal Materials Shandong University Jinan 250100. China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2018年第27卷第3期

页      面：401-404页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：Project supported by the National Basic Research Program of China(Grant No.2015CB921502) the National Natural Science Foundation of China(Grant Nos.11474184 and 11627805) the 111 Project,China(Grant No.B13029) the Fundamental Research Funds of Shandong University,China 

主　　题：spin transparency spin current magnetic insulator inverse Hall effect 

摘      要：The spin transparency at the normal/ferromagnetic metal （NM/FM） interface was studied in PffYIG/Cu/FM multilayers. The spin current generated by the spin Hall effect （SHE） in Pt flows into Cu/FM due to magnetic insulator YIG blocking charge current and transmitting spin current via the magnon current. Therefore, the nonlocal voltage induced by an inverse spin Hall effect （ISHE） in FM can be detected. With the magnetization of FM parallel or antiparallel to the spin polarization of pure spin currents （σsc）, the spin-independent nonlocal voltage is induced. This indicates that the spin transparency at the Cu/FM interface is spin-independent, which demonstrates that the influence of spin-dependent electro-chemical potential due to spin accumulation on the interfacial spin transparency is negligible. Furthermore, a larger spin Hall angle of Fe20Ni80 （Py） than that of Ni is obtained from the nonlocal voltage measurements.